After looking over the entire car to see why the smell of gas is coming out the exhaust I was reading the manual and came accross something called the CIS which is on the passangers side behind the panel, or at least is supposed to be. Right now I have some wires and plugs hanging out but the little computer took off to parts unknown. Would this explain why my car is running rich and idles hard enough I no longer have rust? If so where do I get a replacement one of these and what would the expected cost be? the car is an 80 and considering it's missing would anyone have a part number for me to use in aquiring a new one and what years will work. Thanks for any help.